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Active, not recruitingNCT03368742IGNITE DMDUpdated Oct 15, 2026

Microdystrophin Gene Transfer Study in Adolescents and Children With DMD

A Phase 1/2 interventional study of SGT-001 in Duchenne Muscular Dystrophy, sponsored by Solid Biosciences Inc.. Active, not recruiting at 2 sites in United States. Open to male participants aged 4 Years to 17 Years. Per ClinicalTrials.gov, last updated 2026-10-15.

Sponsored by Solid Biosciences Inc. · Phase 1/2, Interventional, and Treatment

Updated Oct 15, 2026Primary completion movedStudy completion movedGo to Updates ↓
Phase
Phase 1/2
Study type
Interventional
Enrollment
12
Allocation
Non-randomized
Ages
4 Years to 17 Years
Sex
Male
01

Study summary

This is a controlled, open-label, single-ascending dose study to evaluate the safety and tolerability of SGT-001 in adolescents and children with Duchenne muscular dystrophy (DMD). Participants will receive a single intravenous (IV) infusion of SGT-001 and will be followed for approximately 5 years.

The protocol was amended to drop the control arm after 4 participants were dosed.

02

Conditions studied

  • Duchenne Muscular Dystrophy
03

In context

Muscular Dystrophy, Duchenne

481 studies on the registry are indexed under Muscular Dystrophy, Duchenne; 108 are open to participants now.

This study's enrollment of 12 is below the median of 26 across 332 interventional studies indexed under Muscular Dystrophy, Duchenne.

Browse Muscular Dystrophy, Duchenne studies →

Lead sponsor

Solid Biosciences Inc. is the lead sponsor of 6 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
4 Years to 17 Years
Sexes eligible
Male
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Established clinical diagnosis of DMD and documented dystrophin gene mutation predictive of DMD phenotype
  • Confirmed absence of dystrophin as determined by muscle (ambulatory participants)
  • Anti-AAV9 antibodies below protocol-specified thresholds
  • Stable cardiac and pulmonary function
  • Adolescents: non-ambulatory by protocol-specified criteria
  • Children: ambulatory by protocol-specified criteria
  • Stable daily dose (or equivalent) of oral ≥ 12 weeks

Exclusion criteria

Exclusion Criteria:

  • Prior or ongoing medical condition or physical examination, or laboratory findings that could adversely affect participant safety, compromise completion of treatment and follow-up, or impair assessment of study results
  • Abnormal liver function
  • Abnormal renal function
  • coagulation abnormalities
  • Impaired cardiovascular function based on cardiac MRI or ECHO
  • Impaired respiratory function based on FVC % predicted or need for daytime ventilatory support
  • Significant spinal deformity or presence of spinal rods
  • ≥ 95th percentile for age
  • Exposure to another drug within 3 months or 5 half-lives prior to screening
  • Exposure to drugs affecting dystrophin or utrophin expression within 6 months prior to screening

Additional inclusion/exclusion criteria may apply.

Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
12 participants (actual)

Study arms

  • Experimental
    SGT-001 - Dose Level 1

    Single IV infusion of SGT-001 at starting dose

    Genetic: SGT-001

  • Experimental
    SGT-001 - Dose Level 2

    Single IV infusion of SGT-001 at next ascending dose

    Genetic: SGT-001

  • No intervention
    Untreated Control

    Untreated control group. After 1 year, treatment-eligible control participants will receive SGT-001 at the selected dose.

Interventions

  • GeneticSGT-001

    AAV9 vector containing muscle-specific promoter and microdystrophin construct

06

What researchers measure

Primary outcomes

  1. Number of Participants with Treatment Emergent Adverse Events (TEAEs)

    Time frame: Up to 5 years

Secondary outcomes

  1. Number of Participants with Clinically Significant Abnormalities in Laboratory Parameters

    Time frame: Up to 5 years

  2. Number of Participants with Clinically Significant Abnormalities in Vital Signs

    Time frame: Up to 5 years

  3. Number of Participants with Clinically Significant Abnormalities in Physical Examinations

    Time frame: Up to 5 years

  4. Number of Participants with Clinically Significant Abnormalities in Electrocardiogram (ECG)

    Time frame: Up to 5 years

  5. Change from Baseline in Microdystrophin Protein Levels in Muscle Biopsies Using Western Blot (WB)

    Time frame: Baseline, 12 months

  6. Change from Baseline in Microdystrophin Protein Levels in Muscle Biopsies Using Immunofluorescence (IF)

    Time frame: Baseline, 12 months

  7. Change from Baseline in North Star Ambulatory Assessment (NSAA) score in Ambulatory Participants

    Time frame: Baseline, 12 months

  8. Change from Baseline in 6-minute walk test (6MWT) Distance in Ambulatory Participants

    Time frame: Baseline, 12 months

  9. Change from Baseline in Total Upper Limb Function, as Measured by the Total Performance of the Upper Limb (PUL) Functional Scale Score

    Time frame: Baseline, 12 months

  10. Change from Baseline in Respiratory Function, as Measured by Forced Vital Capacity (FVC) % Predicted, Forced Expiratory Volume in 1 second (FEV1) % Predicted, and Peak Expiratory Flow (PEF) % Predicted

    Time frame: Baseline, 12 months

  11. Change from Baseline in Ejection Fraction, As Measured by Echocardiography

    Time frame: Baseline,12 months

  12. Change from Baseline in Left Ventricular End Systolic Volume, As Measured by Echocardiography

    Time frame: Baseline,12 months

  13. Change from Baseline in Myocardial Peak Circumferential Strain (Ecc), As Measured by Echocardiography

    Time frame: Baseline,12 months

  14. Change from Baseline in Quality of Life as Measured by the Paediatric Quality of Life Inventory (PedsQL) Duchenne muscular dystrophy (DMD) module and self-reported outcome measures as measured by the PODCI DMD module

    Time frame: Baseline, 12 months

07

Study locations

2 sites
08

References and documents

Publications

  • Boehler JF, Brown KJ, Ricotti V, Morris CA. N-terminal titin fragment: a non-invasive, pharmacodynamic biomarker for microdystrophin efficacy. Skelet Muscle. 2024 Jan 16;14(1):2. doi: 10.1186/s13395-023-00334-y. PubMed 38229112 ↗

Individual participant data

Plan to share: No

09

Updates

1 registry update since Sep 25, 2026
Primary completion
Oct 15, 2026→Nov 30, 2026
Oct 15, 2026
Study completion
Oct 15, 2026→Nov 30, 2026
Oct 15, 2026
Show all 1 update
  1. Oct 15, 2026
    Primary completion Oct 15, 2026→Nov 30, 2026
    Study completion Oct 15, 2026→Nov 30, 2026
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT03368742
Lead sponsor
Solid Biosciences Inc.
Responsible party
Sponsor
First posted
Dec 11, 2017
Start date
Dec 6, 2017
Primary completion
Nov 30, 2026 (estimated)
Completion
Nov 30, 2026 (estimated)
Last update
Oct 15, 2026

Study contacts

Solid Bio Clinical Trials
study director · Solid Biosciences

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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